/*
 * Copyright 2004-2005 The Apache Software Foundation or its licensors,
 *                     as applicable.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.jackrabbit.core.query.lucene;

import org.apache.lucene.index.Term;

/**
 * Defines an interface that allows implementing classes to listen for index
 * changes (namely document deletes) while using a {@link ReadOnlyIndexReader}.
 */
public interface IndexListener {

    /**
     * Informs this listener, that the document with <code>id</code> has been
     * deleted.
     *
     * @param id the <code>Term</code> that identifies the deleted document.
     */
    public void documentDeleted(Term id);
}
